Service difficulty report · Bearing Cage · Aerosp ATR42300

Difficulty date
December 15, 2009
Submitted
January 19, 2010
Operation
General aviation
Make and model
Aerosp ATR42300
Aircraft time
33,984 hours
Engine
Pwa PW120
Propeller
Hamstd 14SF5
Part
Bearing Cage
Part number
782307
Condition
Broken
Location
Prop Bearing
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) DURING A REMOVAL OF THE PITCH ACTUATOR ON THE NR 1 PROPELLER, MAINTENANCE FOUND THE BALL SEPARATOR WAS BROKEN AND A BALL WAS MISSING. THE BALL WAS LOCATED BUT IT WAS BADLY OUT OF ROUND SO A FURTHER INSPECTION WAS CARRIED OUT AND THE BEARING RACE FOR THE NR 4 BLADE WAS FOUND PITTED AND SCORED OUT OF LIMITS IAW THE CMM. THE PROPELLER HUB PART NUMBER IS 782701-5, SERIAL NUMBER 1829. (TC NR 20091218002)

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